#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
using namespace std;

bool leap_year(int y){
    return ((y % 4 == 0 && y % 100 != 0) || y % 400 == 0);
}

int days[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int days2[] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

signed main(){
    int y, m, d;
    scanf("%d/%d/%d", &y, &m, &d);
    d += 2;
    if(leap_year(y)){
        if(days2[m - 1] < d){
            d -= days2[m - 1];
            m++;
        }
    }else{
        if(days[m - 1] < d){
            d -= days[m - 1];
            m++;
        }
    }
    if(m > 12){
        m -= 12;
        y++;
    }
    printf("%d/%02d/%02d\n", y, m, d);
}